20150569 has 2 divisors, whose sum is σ = 20150570. Its totient is φ = 20150568.

The previous prime is 20150513. The next prime is 20150573. The reversal of 20150569 is 96505102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20115225 + 35344 = 4485^2 + 188^2 .

It is a cyclic number.

It is not a de Polignac number, because 20150569 - 2¹¹ = 20148521 is a prime.

It is a super-2 number, since 2×20150569² = 812090862047522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20153569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075284 + 10075285.

It is an arithmetic number, because the mean of its divisors is an integer number (10075285).

Almost surely, 2^20150569 is an apocalyptic number.

It is an amenable number.

20150569 is a deficient number, since it is larger than the sum of its proper divisors (1).

20150569 is an equidigital number, since it uses as much as digits as its factorization.

20150569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 20150569 is about 4488.9385159523. The cubic root of 20150569 is about 272.1212379439.

The spelling of 20150569 in words is "twenty million, one hundred fifty thousand, five hundred sixty-nine".